https://blog.faceutil.com/2017/04/30/mame-%ec%a0%84%ec%8b%a0-%eb%a7%88%ea%b4%b4-denjin-makai-%eb%8b%a4%ec%9a%b4-%eb%8b%a4%ec%9a%b4%eb%a1%9c%eb%93%9c-down-%e3%82%93/